55415331 has 12 divisors (see below), whose sum is σ = 80449200. Its totient is φ = 36756720.

The previous prime is 55415323. The next prime is 55415333. The reversal of 55415331 is 13351455.

It is not a de Polignac number, because 55415331 - 2³ = 55415323 is a prime.

It is a super-2 number, since 2×55415331² = 6141717819679122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55415295 and 55415304.

It is not an unprimeable number, because it can be changed into a prime (55415333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13680 + ... + 17261.

It is an arithmetic number, because the mean of its divisors is an integer number (6704100).

Almost surely, 2^55415331 is an apocalyptic number.

55415331 is a deficient number, since it is larger than the sum of its proper divisors (25033869).

55415331 is a wasteful number, since it uses less digits than its factorization.

55415331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31146 (or 31143 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 55415331 is about 7444.1474327152. The cubic root of 55415331 is about 381.2501096121.

Adding to 55415331 its reverse (13351455), we get a palindrome (68766786).

The spelling of 55415331 in words is "fifty-five million, four hundred fifteen thousand, three hundred thirty-one".